I know people who quit medical jobs, like nurse in a big hospital, to do another job that's equally shitty. Quitting by itself makes sense, as most of them won't be promoted to a manager, statistically speaking.
I think, what they really should consider is to find a better hospital (instead of becoming a massager or a cashier).
Maybe smaller hospitals have less stress. The way I change my job is to contact friends and gather information about their workplaces.